Warp stop-motion for looms.



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No. 858.695. PATENTBD JULY 2, 1907. J. woJcIBcHowsKI s R. PLUZANSKI.`

WARP STOP MOTION FOR LOOMS. APPLIoATiqN FILED JUNE 21., 1905.

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UNrrnn s rngss PATENT Yersten.

.IAKOB WOJCIEGHOWSKI, OF WARSAW, AND ROMAN PLUZANSKI, OF STOMPERKOW,RUSSIA.

WARP STOP-MOTION FOR LOOMS.

Specification of Letters Patent.

Patented July 2, 1907.

Application filed June 21', 1905. Serial No. 266,362.`

To all whom it may concern:

Be it known that we, .TAKoB WoJeIECHoWsKI, residing at Warsaw, Russia,and ROMAN PLUZANSKI, residing at Stomperkow, Russia, subjects of theEmperor of Russia, have invented certain new and useful Improvements inWarp Stop-Motions for Looms; and we do hereby declare the following tobe a full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and usethe same. I

This invention relates to a device for automatically stopping the loomas soon as one or more warp-threads is or are broken. The operation ofthe invention is based on the arrangement that equidistant from oneanother pendulums are pivotally suspended from a beam which pendulumsmove with said beam continuously to and fro transversely of and abovethe warps, and which on the breakage of a warp thread are caused toswing, the swing of the pendulums being produced by the threads whenbroken being blown into the spaces between the teeth of a stationaryrake or comb the thread end being pressed on the forward side thereof bymeans of slip-springs, whereupon the pendulums at their lower ends meetthe raised end of the warp thread and are moved out of their verticalposition. The swing of the pendulum effects engagement of pawlsconnected therewith with the teeth of a'transverse rack-bar arrangedabove said comb or rake, which rackbar is hereby moved forward. Theresult of the forward movement of the rack-bar is to throw out of gearthe beam to which the pendulums and pawls are secured and to operate adevice for stopping the loom by means of a cord and a springarrangement.

In the accompanying drawings which illustrate the invention Figure 1 isa front elevation, Fig. 2 is a similar view when a warp thread has beenbroken, Fig. 3 is a view of the air blast pipe, Fig. 4 shows acontinuation of Fig. 1, Fig. 5 is a left handv end view of Fig. l, Fig.6 is a rear elevation of Fig. 1, Fig. 7 is a cross section on the line7-7 of Fig. 6.

As shown transversely above the warp threads'S (Fig. 1 and 7) isdisposed the stationary rake 9 having very narrow pointed teeth 10. Thisrake 9 carries loosely mounted thereon a rack bar l2 which during theregular operation of the loom does not vary its position, but whensubjected to a denite pressure, which takes'place when a warp thread isbroken, is moved longitudinally above the rake 9. Parallel to the rake 9and likewise transversely above the warp is arranged the beam 1l, andwhich is reciprocated continuously. Beneath the rake and the warp is anair pipe 13 which is provided on the top with orifices 14 (Fig. 3) andis so connected with the beam 11 that upon its longitudinal movement thebeam 11 is simultaneously moved therewith. The warp are as shown in Fig.1 and 2, disposed between the beam 11 and the pipe 13. As shown in Fig.3 the orifices 14 in the air pipe 13 are arranged iIl groups which aredisposed equidistant from one another. Corresponding to the number ofgroups of oriices which afford an outlet for a current of compressed airthere are suspended on the beam 1l pendulums `l5 (Figs. 1, 2 and 6)mounted loosely on the spindles 16 (Fig. 6.) The pendulums 15 areprovided beneath with hook-like ends 17 which lie above the openings 14.The hook-like end 17 in consequence of the weight of the pendulum 15remains in vertical position. On the same spindles 15 as the pendulumsare loosely mounted pawls 18 (Fig.'6 and 7) with pins 19 secured ontheir side faces which pins-during the regular operation of the loom lieon the abutments 20 of the pendulums 15 but when said pendulums arecaused to swing the abutting projections 20 are also turned away wherebythe pawlsl 18 are allowed to drop and come into engagement with the rack12.

Above the orifices 14 on the air pipe 13 (Fig. 7) the cross section ofwhich is shown in the same figure, there is secured on the beam l1 theupper part of which is bent at right angles to the spring 21 which isscrewed by means of screws 23 (Fig. 1 and 2) to the. beam 11, and towhich is secured a cork or another elastic support 22, which serves topress the broken end of the thread on the teeth 10 of the rake 9. Theair pipe at its one end (in Fig. 1 and 2 the left hand end) isreduced tofiatter formation similar to that of the end of the beam 11, On this endof the pipe 13 is set a finger 24 the upper end of which enters a notch25 in a bent lever 26 which is pivotally mounted on the pin 27 securedto the beam 11. 29 is a pawl pivotally mounted at 28 on the lever 26,and carrying a lateral pin 30. 3l is a bar having notches 32 upon itsunder face in which enter corresponding ridges 33 on the end of the rack12. During the regular operation of the loom the lever 26,. as shown inFig. 1, presses with its free end upon the pin 34 of the beam 11, andthe finger 24 which enters in the notch 25 connects the air pipe 13 withthe beam 11 so that this is reciprocated with the pipe.

In order to facilitate the movement of the beam 11 and the pipe 13 theends thereof are beneath pointed in a form of a roo and mounted onturned `rollers, 35 36, which are fitted loosely on the shafts 37 and 38which are fixed on the stationary parts 39 (Fig. 5), which serves tosecure the entire construction of the frame of the loom. Besides therollers 35 and 3G like rollers 40 and 41 are arranged on the oppositeends of the beam and the pipe. For the purpose of obtaining exactlyuniform forward motion of the beam 11 and the pipe 13, that is, Ainorder that the beam 11 and the pipe 13 on being moved are not shiftedout of the vertical plane, the

flattened ends of same are connected both by the said finger 24 and alsoon one side by means of a clip 43 secured to the end of the beam (Fig.4) which at its lower' end engages the flat pipe of the part 13.

The bar 31 may be moved upwardly in lateral grooves formed by two guides44 44 and so lar until the pawl 29 moved therewith engages the teeth ofthe stationary frame 39 (Fig. 5). The rack 12 is on its' lower laceprovided with a pin 46 (Fig. 6) with which is connected a cord or a wire47, which loops around the pulley 48 and is connected with a suitabledevice lor stopping the loom. Consequently as soon as on the breakage ofa warp thread the rack 12 is moved, at the same time the cord or wire 47sets in motion the apparatus for stopping the loom.

As is known in the art, the breakage of the warp threads always takesplace in the neighborhood of the reed and therefore the device isarranged between the rear warp-beam and the adjoining shaft andtherefore in the direct neighborhood of the drum 49 (Fig. 7). The pipe50 is shown in Fig. 7, and the said pipe 50 serves to lead the air froma compressor or a reservoir filled with compressed air to the air pipe13 which is of triangular section. The air is led from the compressorinto the air pipe always in the same direction as indicated by arrows inFig. 1 and 2, so that both the operation of the pendulums and the partsconnected therewith always takes place on the movement of the beam 11and pipe 13 in one direction. On motion of the beam and pipe in theopposite direction the air current is interrupted by a suitable leafvalve or the like.

The above mentioned device for stopping the loom in case of breakage ofthe warp threads operates as follows: As the pipe 13 and the beam 11move together to and ro along a horizontal path which slightly eX- ceedsthe ldistance between the groups of openings 14 during the movement ofthe pipe 13 all the warp threads are successively subjected to theaction of the air current which issues with a certain pressure from theorifices 14 (Fig. 3) the arrangement of the oriiices 14, as shown inFig. 3 being regular and insuring that the end of the thread will beblown out of the plane of the warps against the comb or rake and will beheld there until the slip spring presses the end of the thread on thefront side of the rake. When one of the warp threads breaks and theorifices 14 on the movement of the tube come under the broken thread thelatter is immediately blown upwards into the space between the teeth 10of the stationary comb 9 and held in this position by the sliding spring21 (Fig. 5) provided with a support 22 of cork or like elastic material,which spring as secured to the beam 11 which moves above the warps whenthe pipe 13 connected with said beam is moved below the warps, thespring 21 with its support 22 pressing with slight friction against theteeth 01": the comb or rake. As soon as the ree end of a broken threadis blown upwardly into the teeth of the rake the spring 22 at oncepresses the end of the thread against the surface of the rake andtightens the thread so that the pendulum 15 arranged on the other sideof the beam meets said threadand is thereby turned on its pivot out ofvertical position, as shown in Fig. 2. The pawls 18 which rests withtheir pins 19 on the proj ections 20 of the pendulums 15, when saidpendulum or pendulums swing, drop downwards so that they engage theteeth ol the slidable rack 12, which being now coupled with the beam 11moves longitudinally therewith. A slight movement of the rakel 12operates on the cord or wire 47 secured thereto which is connected withthe device lor stopping the loom so that the operation ot the loom isinterrupted. l`he loom however is not suddenly brought to rest, .butthis lakes place approximately within a period ol time necessary lor onerotation of the main shalt oi the loom. Were not special device 'lorstopping the beam 11 provided independent oi the motion ol the loom, therack l 2 engaged by the pawl 18 would be moved further than requiredwhich might injure the stop-motion device connected with said rack 12.In order therefore to be able to stop the beam independently oi themotion o the loom, there is provided a device consisting ol the combination of said linger 24 with the lever26, which are arranged at one endof the air pipe and the beam. On the sliding movement ot the rack 12which moves about l5 millimeters, the ridges 33 on the rack leave thenotches 32 of the beam, whereby the beam is raised and herebyli ll s thepawl 29 resting thereon by means oi the pin 30. Hereupon the said pawlengages the teeth ol the sta.- tionary rack 45 disposed above the same.On the beam moving further and therewith moving the pivot of the lever2G which also serves as a pawl the lever 2li is turned upwards and thelinger 24 leaves the notch 25 ot the bent lever 2G. The linger 24 whichis thus released moves urther while the beam 11 now set out ot operationinterrupts its motion with the pendulums stopped by the broken threads,independently ol the motion of the loom, The swing oi the pendulumindicates the place where a thread is broken so that the weaver caneasily ascertain the point and bind the ends together. Aiter the brokenthread has been put right the ily wheel oi the loom is turned backwhereupon the beam 11 and pipe 13 return to theii` original positionwhere they are again coupled by means oi a spring suitably secured andwhich was tensioned on the lorward movement ol the rack. 1t is clearthat alterations can be made in the construction ol". the membersconstituting the device: lor instance instead oi the above mentionedrake or comb a bar ribbed on its lower side or covered with roughmaterial such as plush, leather or the like might be used.

The device above described can be used lor weaving material in suitablecombinations and with the employment oi different kinds ot threads, evenol the. finest such as silk threads lor weaving plush and the like.

What is claimed as new is:

l. In a warp stop motion for looms, the combination ot a toothed memberdisposed transversely above the warp threads, a reciprocatory beam, asource ot' supply for com pressed air beneath said member, and means forreciproeatingl the latter and tllebeam in unison.

2. In a warp stop motion i'or looms, the combination ol' a toothedmember disposed transversely above the warp threads, a reciprocatingbeam, a. source of supply lor compressed air beneath said member, andmeans l'or reciprocating the latter and the beam in unison, and meanscooperating with said toothed member to clamp the broken warp threadthereagainst.

3. In a warp stop motion for looms, the combination ol' a toothed memberdisposed transversely above the warp threads, and means l'or blowing abroken warp thread against said member.

4. In a warp stop motion for looms, the combination ot' a toothed memberdisposed transversely above -the warp threads, and means for blowing abroken warp thread against said member, and a clamp for clamping thebroken thread against said member.

5. In a warp stop ymotion for looms, the combination of a toothed memberdisposed transversely ab'ove the warp threads and means for blowing abroken warp thread against said member, and a clamp for. clamping thebroken thread against said member, a normally stationary rack,

l() a beam adapted to be continuously recprocated, and means on saidbeam for engagement with said rack.

6. In a warp stop motion for looms, the combination 0f a toothed memberdisposed transversely above the Warp threads, and means for blowing abroken warp thread against said member, and a clamp for clamping thebroken thread against said member, a normally stationary rack, a beamadapted to be continuously reciprocated, and means on said beam forengagement With said rack, and means connecting said beam and air pipefor reciprocating them 2() together.

T. In a Warp stop motion for looms, a continuously reciprocating beam, astationary rake, a normally stationary reciprocating rack-bar looselymounted thereon, an air pipe mounted to reciprocate with said beam andpendulnms suspended from said beam for reciprocating said rack bar.

8. In a warp stop-motion for looms, a continuously reciprocating beam, astationary rake, a normally stationary reciprocating rack-bar looselymounted thereon, an air pipe mounted to reciprocate with said beam, andpendulums suspended from said beam for reciprocating said rack-bar, anda clamp carried by said beam for clamping a broken thread against saidrake.

9. In a Warp stop-motion for looms, a continuously reciprocating beam, astationary rake, a normally stationary reciprocating rack-bar looselymounted thereon, an air pipe mountedy to reciprocate with said beam, andpendulums suspended from said beam for reciprocating said rack-bar, anda clamp carried by said beam for clamping a brokenl'thread against saidrake, a finger on the air pipe and a pivoted bent lever on the beam andoperatively connected With the rack bar.

10. In a warp stop-motion for looms, a continuously reciprocating beam,a stationary rake, a normally stationary reciprocating rack-bar ,looselymounted thereon, an air pipe mounted to reciprocate with said beam, andpendulums suspended from said beam for reciprocating said rack-bar, anda clamp carried by said beam for clamping a broken thread against saidrake, a finger on the air pipe and a pivoted bent lever on the beam andoperatively connected with the rack-bar, a stationary rack, and means onsaid bent lever for engaging the same.

In testimony whereof, we atlx our signatures, in presence of twowitnesses.

JAKOB WOJICIECHOWSKI. ROMAN PLUZANSKI.

Witnesses STANISLAW 'PosKsonYM, CYRYL Snnnwlcnr.

